public void Open()
{
if (conn_str == null)
{
throw new InvalidOperationException("No database specified");
}
if (state != ConnectionState.Closed)
{
return;
}
IntPtr errmsg = IntPtr.Zero;
if (Version == 2)
{
try {
sqlite_handle = Sqlite.sqlite_open(db_file, db_mode, out errmsg);
if (errmsg != IntPtr.Zero)
{
string msg = Marshal.PtrToStringAnsi(errmsg);
Sqlite.sqliteFree(errmsg);
throw new ApplicationException(msg);
}
} catch (DllNotFoundException) {
db_version = 3;
} catch (EntryPointNotFoundException) {
db_version = 3;
}
if (busy_timeout != 0)
{
Sqlite.sqlite_busy_timeout(sqlite_handle, busy_timeout);
}
}
if (Version == 3)
{
int err = Sqlite.sqlite3_open16(db_file, out sqlite_handle);
if (err == (int)SqliteError.ERROR)
{
throw new ApplicationException(Marshal.PtrToStringUni(Sqlite.sqlite3_errmsg16(sqlite_handle)));
}
if (busy_timeout != 0)
{
Sqlite.sqlite3_busy_timeout(sqlite_handle, busy_timeout);
}
}
else
{
}
state = ConnectionState.Open;
}